Question

Which of the following statements about the reaction quotient, Q , are correct?

• A. The reaction quotient, Q and the equilibrium constant always have the same value
• B. Q may be greater than or less than or equal to the value of $K_c$
• C. Value of Q does not depend on concentration of the products in a reaction
• D. Q =1 at equilibrium

Answer 1

The correct option is B Q may be greater than or less than or equal to the value of $K_c$

RValue of the reaction quotient,Q and the equilibrium constant will have the same value when the reaction is at equilibrium.
So, option A is incorrect.
As the reaction proceeds, the value of the reaction quotient may be either less than, equal to or greater than the value of equilibrium constant.
So, option b is incorrect
Reaction quotient value depends on the concentration of both reactant and product as the reaction proceeds
So, option c is incorrect.
At equilibrium, the value of reaction quotient is always equal to the value of equilibrium constant which may or may not be equal to 1.